I hope you are taking this advice-

You need to turn up the heat[current]!!!. Do not be afraid to sink some heat into those welds. Those are not the nicest welds. I am skeptical that you are wearing the necessary safety equipment - welding respirator, welding hat, safety glasses, welding jacket & gloves - because welding a k frame creates a lot of sparks, smoke and heat. The smoke is toxic.

Weld everything that has a seam even where it was welded before. Esp where the steering box mounts. You missed a spot in one of the pics.